tert-butyl N-[(4R,7S)-7-({(3R)-1-[N-(tert-butoxycarbonyl)-L-seryl]-3-hydroxy-L-prolyl}amino)-1,3,4,5,6,7,8,10-octahydro-12,14-dihydroxy-11-methyl-6,10-dioxo-9,2,5-benzoxathiazacyclododecin-4-ylcarbonyl]-L-alaninate